The difference between what the most and the least learned people know is inexpressibly trivial in relation to that which is unknown.

In the middle of adversity there is great opportunity.

I believe, indeed, that overemphasis on the purely intellectual attitude, often directed solely to the practical and factual, in our education, has led directly to the impairment of ethical values. I am not thinking so much of the dangers with which technical progress has directly confronted mankind, as of the stifling of mutual human considerations by a 'matter-of-fact' habit of thought which has come to lie like a killing frost upon human relations. Without 'ethical culture' there is no salvation for humanity.

I believe that Gandhi’s views were the most enlightened of all the political men in our time. We should strive to do things in his spirit: not to use violence in fighting for our cause, but by non-participation in anything you believe is evil.

Engineering is not only study of 45 subjects but it is moral studies of intellectual life. Make things as simple as possible..but not simpler.

Truth is what stands the test of experience.

To invent something, all you need is imagination and a big pile of junk.